Daniel b



Patented Dec. 30, 1919.

INVENTOH Mgg/QM.

D. B. MEDANICH.

VALVE MOVEMENT.

APPglcAnoN Flu-:D SEPT. e. .1911.

irrns immuun. iannanrcmor BUECHELKENTUCKY.

vAitvnMovEMENr.

To all whom t may concern: v Y

Be it known that I, DANIEL B. MEDANIOH, a citizen of the United States,residing at Buechel, in the county of Jefferson and State of Kentucky,have invented certain new and useful mprovements in Valve` Movements, ofwhich the following `is a specification. w

This invention relates to `a valve movement adapted to be used inconnection with internal combustion motors, and more particularly withthe construction disclosed in my co-pending application Serial Number74,697 filed Jan. 27, 1916, although it may be found useful in otherconnections.

An object is to provide an improved method of operating a piston valvethat shall be practical, eiiicient and'noiseless. f

With the foregoing and other objects in view, the invention consists ofthe novel construction and Varrangement of parts illus- Y trated in theaccompanying drawing, which formsa part of this speciticatiomwhereinisset forth an embodiment of the invention, but it is to be understoodthat such changes and modifications may be resorted to as come withinthe scope of the appended claims.

Referring to the drawing, wherein simip lar reference charactersdesignate like parts in the several views, Figure 1,"is a transversesectional view of a motor embodying my invention:V Fig. 2, a perspectiveview 0f the valve Operating lever: Fig. 3, a perspective view of theauxiliary lever: Fig; 4, a modified form of auxiliary lever, and Fig. 5,a transverse section of the valve operatmg cam.

Referring now in detail to the annexed drawing, a power cylinder -10- ismounted upon a suitable crank case -11--, within which are movablerespectively, a piston -12 and a crank -13-, the latter being connectedto the piston by means of a connecting rod 14, whereby motion istransmitted from the piston to the crank shaft. The motor illustrated isof a pattern popularly known as T head, exhaust and intake cylinders 15,16 being disposed respectively, on opposite sides of the power cylinder,and communicating therewith by means of ports 17, 18-. A water jacket,-19- envelops the cylinders. The valve cylinders are open at the lowerend to the atmosphere. Eachof the valve cylinders is provided with aninternal annular valve seat 20- (at vthe upperV end thereof)specification of Letters Patent.

against which piston valves -21, 22-- close. Valve rods ,-23V flexibly`connected with the valves by suitable means, such as ball Joints -24depend into position to be actuated, to open the valve, through themedium of levers #25, by cams -26*,- which are mounted on shafts-27,said shafts receiving motion. from the crank shaft by p Patented Dec.30, 1919. Application flied september e, 1917. serial No. 189,954.

to within a spaceddistance of the ports 17 l and 18. By this arrangementa chamber -32-.- is formed between` the upper .end of the sleeves andthe valve seat 2O in which the heads e-334- of the valves operate. Thebody -.-34- of the valve is of reduced diameter to ft the bore of thesleeves. An advantage of this construction is that in case of wear, newAsleeves may` beinserted, ini stead of having to re-bore the cylinder.The length of the chamber 32 is such that when the heads ofthe valveshave cleared the ports 17 and 18, there will be a space between theunder side of the. heads and the e serve as a cushion in the openingmovement.

The inlet valve cylinder communicates at, its upper end with atransverse passage -35- which extends across the head of the engine, andat its outer end is provided with means such as a flange -36- for theattachment of a conduit, which leads to a suitable source of fuelsupply, this passage divides, and passes around a well -37- within whichis positioned a spark plug -38--. An exhaust tube -39- passes throughthe intake passage 35, the arrangement being such that the incoming fuelimpinges upon the tube and is heated by contact therewith. One limb -40-of the operating lever 25 has an enlarged head 4lwhich is provided witha slot -42- through which the valve rod 23 passes. Suitable means suchas a nut -43, is engaged with the valve rod, below the head, and uponthis the lever bears. The inner end of the limb LOis bifurcated and thebifurcations A4- are provided with bearings which embrace the shaft 27.Legs -at6-, which depend from the bifurcations, bear on their lowerVends, oppositely disposed alined rollers -47--. On each face of the cam26, spaced from and following the periphery thereof, is a groove -48--which is adapted to receive the rollers 47. An auxiliary lever *e9- ispivoted on the shaft 27, between the bifurcations of the lever 25, adepending-limb -50- of this lever has a roller` -51- adapted to bear onthe periphery of the` cam, the other limb -52- extends along with thelimb 40 of the main lever 25, and suitable means are provided to co-actwith the respective limbs and cause the roller 51 to hug the peripheryof the cam. Such means may be a threaded post -53v extended from the armof the main lever through a perforation 54.- in the armof the auxiliarylever and carrying a thumb nut 55ewhich may be brought to bear againstthe auxiliary arm and cause the roller to bear unyieldingly against thecam. Or resilient means, such as a spring 56 may be positionedbetweenthe two levers, in which case.

the roller 51 will be held against the cam with a yielding pressure. Itwill be observedthat with the construction described, there will benolost motion between the rollers and the cam and that any wear, ofeither, will be taken up. It is also to be observed that as the pistonrodzis free to move downward through the slot 42 in the head 41 of theoperating lever, that, in the case of the exhaustvalva'as soon as thevalve is moved clear of its seat through the action of the lever, thehead ofthe valve will be subjected to the pressure of the gases from thepower Cylinder, andthe valve will be forced open thereby withl amovement more rapid than, and independent of that of the operatinglever, which later will catch up with andV lone arm of which isoperatively connected with said rod, the other arm thereof beingbifurcated, a cani having grooves on both faces positioned between saidbifurcations, pins extended from the bifurcations and seated in said camgrooves, anV auxiliary lever associated with the first named lever andadapted to bear upon the periphery of the cam, and a resilient elementdisposed between said levers and adapted to cause contact with the camsurfaces.

2. In a valve movement, a valve, a rod connected therewith, a cam shaft,a cam having grooves on both faces mounted thereon, a. parallel shaft,an angular lever-mounted thereon, one arm whereof is operativelyconnected with said rod, said lever being bifurcated for a portion ofitslength andthe shaft bearings being in the furcations, pins extendedfrom the furcations `and received in said grooves, a second angularlever mounted on said parallel" shaft between theJ furcations of thefirst mentioned'lever and having a roller on one end adapted to bearonthe periphery of the cam, and a resilient element positioned betweentheV Vextended arms of the two levers.

DANIEL B; MEDANIGH.

